Del. Ch. Ct. R. 20

(a) Persons Who May Join or Be Joined.

(1) Plaintiffs. Persons may join in one action as

plaintiffs if:

(A) they assert any right to relief jointly, severally,

or in the alternative with respect to or arising out of

the same transaction, occurrence, or series of

transactions or occurrences; and

(B) any question of law or fact common to all

plaintiffs will arise in the action.

(2) Defendants. Persons may be joined in one action as

defendants if:

(A) any right to relief is asserted against them

jointly, severally, or in the alternative with respect

to or arising out of the same transaction, occurrence,

or series of transactions or occurrences; and

(B) any question of law or fact common to all

defendants will arise in the action.

(3) Extent of Relief. Neither a plaintiff nor a defendant

need be interested in obtaining or defending against all

the relief demanded. The Court may grant judgment to

one or more plaintiffs according to their rights, and

against one or more defendants according to their

liabilities.

(b) Protective Measures. The Court may issue

orders—including an order for separate trials—to protect a

party against embarrassment, delay, expense, or other

prejudice that arises from including a person against whom

the party asserts no claim and who asserts no claim against

the party.